Mercurial > sdl-ios-xcode
annotate test/testsem.c @ 1151:be9c9c8f6d53
Removed atexit() from most of the test programs; atexit(SDL_Quit) isn't safe
if SDL is built with a non-cdecl calling convention, and it's just generally
bad practice anyhow.
Now programs explicitly call SDL_Quit() where appropriate, wrap SDL_Quit() in
a cdecl function where it can't be avoided, and rely on the parachute where
a crash might have hit the atexit() before (these ARE test programs, after
all!).
| author | Ryan C. Gordon <icculus@icculus.org> |
|---|---|
| date | Wed, 28 Sep 2005 11:36:20 +0000 |
| parents | 74212992fb08 |
| children | 4d3bb026cd16 |
| rev | line source |
|---|---|
| 0 | 1 |
| 2 /* Simple test of the SDL semaphore code */ | |
| 3 | |
| 4 #include <stdio.h> | |
| 5 #include <stdlib.h> | |
| 6 #include <signal.h> | |
| 7 | |
| 8 #include "SDL.h" | |
| 9 #include "SDL_thread.h" | |
| 10 | |
| 11 #define NUM_THREADS 10 | |
| 12 | |
| 13 static SDL_sem *sem; | |
| 14 int alive = 1; | |
| 15 | |
|
1151
be9c9c8f6d53
Removed atexit() from most of the test programs; atexit(SDL_Quit) isn't safe
Ryan C. Gordon <icculus@icculus.org>
parents:
0
diff
changeset
|
16 /* Call this instead of exit(), so we can clean up SDL: atexit() is evil. */ |
|
be9c9c8f6d53
Removed atexit() from most of the test programs; atexit(SDL_Quit) isn't safe
Ryan C. Gordon <icculus@icculus.org>
parents:
0
diff
changeset
|
17 static void quit(int rc) |
|
be9c9c8f6d53
Removed atexit() from most of the test programs; atexit(SDL_Quit) isn't safe
Ryan C. Gordon <icculus@icculus.org>
parents:
0
diff
changeset
|
18 { |
|
be9c9c8f6d53
Removed atexit() from most of the test programs; atexit(SDL_Quit) isn't safe
Ryan C. Gordon <icculus@icculus.org>
parents:
0
diff
changeset
|
19 SDL_Quit(); |
|
be9c9c8f6d53
Removed atexit() from most of the test programs; atexit(SDL_Quit) isn't safe
Ryan C. Gordon <icculus@icculus.org>
parents:
0
diff
changeset
|
20 exit(rc); |
|
be9c9c8f6d53
Removed atexit() from most of the test programs; atexit(SDL_Quit) isn't safe
Ryan C. Gordon <icculus@icculus.org>
parents:
0
diff
changeset
|
21 } |
|
be9c9c8f6d53
Removed atexit() from most of the test programs; atexit(SDL_Quit) isn't safe
Ryan C. Gordon <icculus@icculus.org>
parents:
0
diff
changeset
|
22 |
| 0 | 23 int ThreadFunc(void *data) |
| 24 { | |
| 25 while ( alive ) { | |
| 26 SDL_SemWait(sem); | |
| 27 fprintf(stderr, "Thread number %d has got the semaphore (value = %d)!\n", (int)data, SDL_SemValue(sem)); | |
| 28 SDL_Delay(200); | |
| 29 SDL_SemPost(sem); | |
| 30 fprintf(stderr, "Thread number %d has released the semaphore (value = %d)!\n", (int)data, SDL_SemValue(sem)); | |
| 31 SDL_Delay(1); /* For the scheduler */ | |
| 32 } | |
| 33 printf("Thread number %d exiting.\n", (int)data); | |
| 34 return 0; | |
| 35 } | |
| 36 | |
| 37 static void killed(int sig) | |
| 38 { | |
| 39 alive = 0; | |
| 40 } | |
| 41 | |
| 42 int main(int argc, char **argv) | |
| 43 { | |
| 44 SDL_Thread *threads[NUM_THREADS]; | |
| 45 int i, init_sem; | |
| 46 | |
| 47 if(argc < 2) { | |
| 48 fprintf(stderr,"Usage: %s init_value\n", argv[0]); | |
|
1151
be9c9c8f6d53
Removed atexit() from most of the test programs; atexit(SDL_Quit) isn't safe
Ryan C. Gordon <icculus@icculus.org>
parents:
0
diff
changeset
|
49 return(1); |
| 0 | 50 } |
| 51 | |
| 52 /* Load the SDL library */ | |
| 53 if ( SDL_Init(0) < 0 ) { | |
| 54 fprintf(stderr, "Couldn't initialize SDL: %s\n",SDL_GetError()); | |
|
1151
be9c9c8f6d53
Removed atexit() from most of the test programs; atexit(SDL_Quit) isn't safe
Ryan C. Gordon <icculus@icculus.org>
parents:
0
diff
changeset
|
55 return(1); |
| 0 | 56 } |
| 57 signal(SIGTERM, killed); | |
| 58 signal(SIGINT, killed); | |
| 59 | |
| 60 init_sem = atoi(argv[1]); | |
| 61 sem = SDL_CreateSemaphore(init_sem); | |
| 62 | |
| 63 printf("Running %d threads, semaphore value = %d\n", NUM_THREADS, init_sem); | |
| 64 /* Create all the threads */ | |
| 65 for( i = 0; i < NUM_THREADS; ++i ) { | |
| 66 threads[i] = SDL_CreateThread(ThreadFunc, (void*)i); | |
| 67 } | |
| 68 | |
| 69 /* Wait 10 seconds */ | |
| 70 SDL_Delay(10 * 1000); | |
| 71 | |
| 72 /* Wait for all threads to finish */ | |
| 73 printf("Waiting for threads to finish\n"); | |
| 74 alive = 0; | |
| 75 for( i = 0; i < NUM_THREADS; ++i ) { | |
| 76 SDL_WaitThread(threads[i], NULL); | |
| 77 } | |
| 78 printf("Finished waiting for threads\n"); | |
| 79 | |
| 80 SDL_DestroySemaphore(sem); | |
|
1151
be9c9c8f6d53
Removed atexit() from most of the test programs; atexit(SDL_Quit) isn't safe
Ryan C. Gordon <icculus@icculus.org>
parents:
0
diff
changeset
|
81 SDL_Quit(); |
| 0 | 82 return(0); |
| 83 } |